About: http://webisa.webdatacommons.org/122271438

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In a conference calling situation, where a plurality of uses desire to speak to each other, there is a need for an economical method and apparatus for implementing such a system.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com